scholarly journals Antagonism of Lentinus Cladopus Lc4 Extract, Trichoderma sp. Jpa Extract on Bacillus sp., Xanthomonas sp. and E. Coli

2019 ◽  
Vol 1155 ◽  
pp. 012057
Author(s):  
Sukmawati ◽  
E Angraini ◽  
D N Angraeni ◽  
S S Umami ◽  
E Sumiati ◽  
...  
Keyword(s):  
Bacillus Sp ◽  
E Coli ◽  
Trichoderma Sp

Efecto proapoptótico y antimetastásico en líneas tumorales humanas colorrectales de una proteína secretada por la bacteria Rizosférica Antártica Bacillus sp. K2I17

2019 ◽  
Author(s):  
Alequis Tomás Pavón Oro
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Staphylococcus Aureus ◽  
Candida Albicans ◽  
Deschampsia Antarctica ◽  
Bacillus Sp ◽  
E Coli ◽  
Cáncer Colorrectal

El cáncer es la segunda causa de muerte en el mundo, y específicamente en Chile el cáncer colorrectal es el único que presenta un aumento sostenido de la mortalidad en la última década. La búsqueda de nuevos agentes quimioterapeúticos anticancerígenos ha propuesto a los microorganismos extremófilos como una fuente potencial para obtener moléculas citotóxicas, que induzcan apoptosis en las células tumorales. Las condiciones extremas del continente antártico y las presiones selectivas por el espacio y los nutrientes que se producen entre los microorganismos del rizobioma de la planta Deschampsia antarctica Desv sugirieron como hipótesis que las bacterias rizosféricas aisladas en la Antártica secretan al sobrenadante de cultivo moléculas bioactivas que inhiben la invasión y proliferación de líneas tumorales humanas de origen colorrectal mediante un mecanismo apoptótico. En este sentido, el objetivo general del trabajo fue identificar y caracterizar a moléculas bioactivas con acción antinvasiva y antiproliferativa, además, determinar el mecanismo inhibitorio de la proliferación en líneas tumorales humanas de origen colorrectal. Los resultados del primer objetivo específico demostraron que los sobrenadantes de cultivo de los aislados rizosféricos antárticos K2 y MI disminuyeron la viabilidad de la línea celular de adenocarcinoma colorrectal LoVo en el ensayo de reducción metabólica del MTT. Además, como los sobrenadantes no tuvieron efecto en la viabilidad de las bacterias E. coli y Staphylococcus aureus, y tampoco en los hongos unicelulares Candida albicans y Saccharomyces cerevisiae, el resultado indicó que la actividad antiproliferativa fue selectiva hacia la línea celular LoVo.

scholarly journals ISOLASI BAKTERI DARI TANAH SEBAGAI PENGHASIL SENYAWA ANTIMIKROB

Biospecies ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 46-51
Author(s):  
Sukmawati Sukmawati ◽  
FEBRIANTI ROSALINA
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Bacillus Sp ◽  
E Coli

Antibiotik adalah bahan obat yang sangat memegang peranan penting dalam menanggulangi penyakit infeksi. Senyawa antimikroba dapat diperoleh dari tumbuh-tumbuhan, dan mikroba. Senyawa antimikrob yang dihasilkan oleh mikroba memiliki keunggulan dibandingkan dengan antibiotik sintetik karena memiliki sifat yang lebih efektif, sebab targetnya spesifik serta toksisitasnya rendah. Tujuan dari penelitian yang telah dilakukan ialah untuk mengisolasi bakteri dari tanah yang mampu menghasilkan senyawa antimikrob, serta untuk menguji aktivitas penghambtannya terhadap  pertumbuhan Escherichia coli dan Staphylococcus aureus. Metode yang telah digunakan dalam penelitian ini ialah isolasi, purifikasi, dan seleksi bakteri dari sampel tanah dengan metode uji penghambatan sedangkan bakteri Bacillus sp. Merupakan bakteri pembanding. Berdasarkan hasil penelitian yang diperoleh terdapat 2 isolat yang berpotensi memiliki aktivitas antimikroba yaitu isolat 1 dan isolate 4. Isolat 1 lebih berpotensi menghambat E. coli dengan indeks hambat 4.0 mm dibandingkan dengan penghambatan S. aureus dengan indeks hambat 3.1 mm. Sedangkan isolat 4 lebih berpotensi menghambat S. aureus dengan indeks hambat 2.8 mm dibandingkan dengan penghambatan terhadap E. coli dengan indeks hambat 1.4 mm.

scholarly journals Highly efficient novel recombinant L-asparaginase with no glutaminase activity from a new halo-thermotolerant Bacillus strain

Bioimpacts ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 15-23 ◽  
Author(s):  
Azam Safary ◽  
Rezvan Moniri ◽  
Maryam Hamzeh-Mivehroud ◽  
Siavoush Dastmalchi
Keyword(s):  
Lymphoblastic Leukemia ◽  
Industrial Applications ◽  
Biochemical Properties ◽  
Substrate Affinity ◽  
Bacillus Sp ◽  
Recombinant Enzymes ◽  
E Coli ◽  
Bacillus Strain ◽  
Antineoplastic Effect ◽  
Wide Range

Introduction: The bacterial enzyme has gained more attention in therapeutic application because of the higher substrate specificity and longer half-life. L-asparaginase is an important enzyme with known antineoplastic effect against acute lymphoblastic leukemia (ALL). Methods: Novel L-asparaginase genes were identified from a locally isolated halo-thermotolerant Bacillus strain and the recombinant enzymes were overexpressed in modified E. coli strains, OrigamiTM B and BL21. In addition, the biochemical properties of the purified enzymes were characterized, and the enzyme activity was evaluated at different temperatures, pH, and substrate concentrations. Results: The concentration of pure soluble enzyme obtained from Origami strain was ~30 mg/L of bacterial culture, which indicates the significant improvement compared to L-asparaginase produced by E. coli BL21 strain. The catalytic activity assay on the identified L-asparaginases (ansA1 and ansA3 genes) from Bacillus sp. SL-1 demonstrated that only ansA1 gene codes an active and stable homologue (ASPase A1) with high substrate affinity toward L-asparagine. The Kcat and Km values for the purified ASPase A1 enzyme were 23.96s-1 and 10.66 µM, respectively. In addition, the recombinant ASPase A1 enzyme from Bacillus sp. SL-1 possessed higher specificity to L-asparagine than L-glutamine. The ASPase A1 enzyme was highly thermostable and resistant to the wide range of pH 4.5–10. Conclusion: The biochemical properties of the novel ASPase A1 derived from Bacillus sp. SL-l indicated a great potential for the identified enzyme in pharmaceutical and industrial applications.

scholarly journals OPTIMASI PROSES UNTUK EKSPRESI GEN ENDOGLUKANASE DARI Bacillus sp. RP1 OLEH Escherichia coli BL21 (DE3)/ egc

2018 ◽  
Vol 5 (1) ◽  
pp. 44
Author(s):  
Hans Victor ◽  
Maelita Ramdani Moeis
Keyword(s):  
Escherichia Coli ◽  
Enzyme Activity ◽  
Process Optimization ◽  
Rice Hull ◽  
Bacillus Sp ◽  
Fermentation Time ◽  
E Coli ◽  
Cell Weight ◽  
Dry Cell Weight ◽  
Dry Cell

Process Optimization for Endoglucanase Gene Expression Derived from Bacillus sp. RP1 by Escherichia coli BL21 (DE3)/egcABSTRACTCellulases are one of the most used enzymes in industrial processes. In an effort to increase production, industries have developed strategies such as isolating new cellulase producing strains, genetic engineering and process optimization since the last 50 years. One endoglucanase producing strain, Bacillus sp. RP1 was isolated from hot springs. The ribosome binding site and coding sequence of the endoglucanase gene (egc) from Bacillus sp. RP1 was cloned into pGEM-T Easy. The recombinant plasmid was used to transform E. coli BL21 (DE3). Cloning was followed by process optimization. Medium composition was selected using Plackett-Burman design. The medium components tested were rice hull, molasses, ammonium chloride, urea and fishmeal. Rice hull and molasses were found to be the factors most influencing enzyme activity and dry cell weight, respectively. The next step involved Box-Behnken method and response surface methodology to optimize the responses against molasses concentration, rice hull concentration and fermentation time. The concentration intervals used to test were 1%, 5.5% and 10% while the fermentation time used were 24, 36 and 48 hours. The conditions which optimized both enzyme activity and dry cell weight were 7.45% molasses, 6.45% rice hull and 39.52 hours of fermentation.Keywords: Bacillus sp. RP1, E. coli BL21 (DE3), egc, Endoglucanase, optimization ABSTRAKSelulase adalah salah satu enzim yang banyak dimanfaatkan dalam berbagai industri. Sebagai upaya untuk memenuhi kebutuhan, 50 tahun terakhir dikembangkan beberapa strategi untuk meningkatkan produksi selulase yang mencakup rekayasa genetika dan optimasi proses. Karena itu, dilakukan kloning gen egc dan RBS yang berasal dari Bacillus sp. RP1 yang diisolasi dari sumber air panas ke dalam vektor pGEM-T Easy. E. coli BL21 (DE3) ditransformasikan dengan vektor yang mengandung gen egc tersebut. Setelah kloning, optimasi proses berupa desain medium turut dilakukan untuk mengoptimalkan ekspresi gen egc. Desain medium diawali dengan seleksi komposisi medium menggunakan metode Plackett-Burman. Komponen medium yang diuji adalah kulit beras, molase, amonium klorida, urea dan tepung ikan. Kulit beras dan molase diperoleh sebagai bahan yang paling berpengaruh terhadap aktivitas enzim dan berat kering sel. Tahap selanjutnya melibatkan metode statistik Box-Behnken dan metodologi respons permukaan yang bertujuan mengoptimalkan respons aktivitas enzim dan berat kering sel terhadap konsentrasi molase, konsentrasi kulit beras dan lama fermentasi. Konsentrasi yang diuji adalah 1%, 5,5% dan 10%, sedangkan lama fermentasi yang diuji adalah 24, 36 dan 48 jam. Konsentrasi optimal molase adalah 7,45% dan konsentrasi optimal kulit beras adalah 6,45% dengan lama fermentasi optimal 39,52 jam.Kata Kunci: Bacillus sp. RP1, E. coli BL21 (DE3), egc, Endoglukanase, optimasi

scholarly journals Consortium Application of Endophytic Bacteria and Fungi Improves Grain Yield and Physiological Attributes in Advanced Lines of Bread Wheat

2018 ◽  
Vol 6 (2) ◽  
pp. 136 ◽  
Author(s):  
Ghulam Muhae-Ud-Din ◽  
Muhammad Amjad Ali ◽  
Muhammad Naveed ◽  
Khalid Naveed ◽  
Amjad Abbas ◽  
...  
Keyword(s):  
Grain Yield ◽  
Endophytic Bacteria ◽  
Flag Leaf ◽  
Yield Enhancement ◽  
Bacillus Sp ◽  
Dry Land ◽  
Yield Attributes ◽  
Trichoderma Sp ◽  
Bacteria And Fungi ◽  
Relative Membrane Permeability

Increasing human population places pressure on agriculture. To feed this population, two time increase in the current wheat production is needed. Today agriculture is becoming input intensive with more reliance on synthetic fertilizers and agrochemicals to fulfil the feed demand of the growing numbers. Use of synthetic fertilizer since last few years is impacting the soil quality. In this scenario, the use of beneficial endophytic microbes is an attractive strategy to overcome the use of synthetic products. To investigate the effect of consortium application of endophytic bacteria and fungus on plant growth, grain yield moisture status, a pot experiment was conducted in different wheat lines. It comprised four treatments like control, application of bacterial strain Bacillus sp. MN54, fungal strain Trichoderma sp. MN6, and their consortium (Bacillus sp. MN54 + Trichoderma sp. MN6). The effect of consortium application was more prominent and significantly different from the sole application of bacteria and fungus. The results showed that with a consortium application of endophytic bacteria and fungus, there was 28.6, 4.3, -6.3 and -3.7% increases in flag leaf area, chlorophyll content, relative membrane permeability and water content respectively. Consortia of endophytic microbes also resulted in the yield enhancement through the betterment of various yield attributes like number of spikelet’s, grains per spike and grain yield per plant (32.2, 25.8 and 30.8%, respectively). So, consortia of endophytic microbes can greatly promote the progress of plants in dry land agriculture and increase the yield in an environmentally sustainable way.

scholarly journals BIOCONTROLE DE Macrophomina phaseolina E PROMOÇÃO DO CRESCIMENTO NA CULTURA DO GIRASSOL COM O USO DE Trichoderma sp. E RIZOBACTÉRIAS

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Nelrilene Pereira da Silva ◽  
Marta Cristina Corsi de Filippi ◽  
Fábio José Gonçalves ◽  
Alan Carlos Alves de Souza
Keyword(s):  
Bacillus Subtilis ◽  
Macrophomina Phaseolina ◽  
Bacillus Sp ◽  
Trichoderma Sp

Fungos fitopatogênicos habitantes do solo como Macrophomina phaseolina são de difícil controle, principalmente por formarem estruturas de resistência. Por se tratar de uma espécie polífaga, faz-se necessário realizar estudos para se obter diferentes formas efetivas de controle. Diante disso, o objetivo deste trabalho foi testar a eficiência de microrganismos benéficos no controle biológico de M. phaseolina, e na promoção de crescimento à cultura do girassol. A presente pesquisa foi realizada em duas etapas, uma com ensaio in vitro e outra com ensaio in vivo. O ensaio in vitro foi conduzido no laboratório de análises microbiológicas AgroLab, onde realizou-se teste de pareamento de culturas com seis tratamentos e três repetições, sendo, (T1 - Trichoderma sp. + patógeno; T2 - Bacillus sp. + patógeno; T3 – B. pyrrocinia + patógeno; T4 – P. fluorescens + patógeno; T5 – B. subtilis + patógeno e T6 - somente o patógeno), avaliou-se a ocorrência de antibiose e selecionou-se os isolados mais promissores para o ensaio in vivo. O ensaio in vivo foi realizado na Unidade Experimental do laboratório AgroLab, em recipientes de 400 mL, em cultivo protegido, sendo conduzido em Delineamento Inteiramente Casualizado com cinco tratamentos (T1 – controle; T2 - Trichodermil®; T3 - Trichoderma sp.; T4 - B. pyrrocinia e T5 - B. subtilis) em oito repetições. Foram avaliados a capacidade dos bioagentes em suprimir a severidade da doença e, sua eficiência como promotores de crescimento para a cultura do girassol. Os parâmetros avaliados nas análises de crescimento foram: comprimento de raiz e parte aérea e, biomassa da raiz e parte aérea. Os resultados mostraram diferença significativa entre si pelo teste de F (p < 0,05). Nos testes in vitro, os isolados de Trichoderma sp., Bacillus subtilis e B. pyrrocinia reportaram melhor atividade antagônica com 10,93%, 10,26% e 3,71% de inibição do crescimento micelial do patógeno, respectivamente. Na promoção de crescimento todos os tratamentos promoveram maior comprimento da raiz e aumento da biomassa da parte aérea. Não houve diferença significativa para comprimento da parte aérea em relação a testemunha, e os isolados de B. subtilis, B. pyrrocinia e Trichoderma sp. apresentaram maior biomassa da raiz. Na severidade da doença os tratamentos com B. subtilis, B. pyrrocinia, Trichoderma sp. e Trichodermil®, apresentaram 90,5%, 81,0%, 81,0% e 62,5% de supressão do patógeno, respectivamente. Concluiu-se que estes microrganismos apresentam potencial como promotores de crescimento e biocontroladores da doença, podendo tornar-se técnica viável a ser inserida ao Manejo Integrado de Doenças.

scholarly journals Kloning dan Sekuensing Gen Xilanase dengan Produk Gen Berukuran 30 kDa dari Bacillus halodurans CM1 pada Escherichia coli DH5α

2016 ◽  
Vol 18 (2) ◽  
pp. 167
Author(s):  
Dearesty Safirah ◽  
Is Helianti ◽  
Hermin Pancasakti Kusumaningrum ◽  
Anto Budiharjo
Keyword(s):  
Escherichia Coli ◽  
Paper Industry ◽  
Bacillus Halodurans ◽  
Bacillus Sp ◽  
Environment Pollution ◽  
Gene Fragment ◽  
Xylanase Gene ◽  
E Coli ◽  
Optimal Activity ◽  
Xylanase Enzyme

The paper industry contributed the environment pollution due to chlor substances. Utilization of alkalothermophilic xylanase enzyme as a biocatalyst in the production of paper may become an environmentally friendly biobleaching alternative. Bacillus halodurans CM1 produces xilanase enzyme that had optimal activity at pH 9 and temperature 70°C. Previous study showed that this CM1 strains has several xilanase genes. The cloning of one of these alkalothermophiic xylanase (alkxyn) gene has been already conducted. This study aimed to clone alkxyn gene that encode alkalothermophilic xylanase enzyme from B. halodurans CM1 into Escherichia coli DH5α. Amplification of alkxyn has been carried out using primers for amplification xylanase 30 kDa. The alkxyn gene fragment was inserted into pGEM-T Easy vector and then transformed into E. coli DH5α. The results showed that the recombinant of E. coli DH5α harboring alkxyn gene from B. halodurans CM1 has been obtained. The sequences analysist based on BLAST showed that alkxyn fragment has homology (99%) with the alkaliphilic xylanase gene from Bacillus sp. 31 which encodes alkaliphilic xilanase (Genebank assession number: JF912895.1). Keywords: cloning, Bacillus halodurans CM1, xylanase, alkalothermophilic.

PEMANFAATAN SARANG SEMUT (Myrmecodia pendens) ASAL KALIMANTAN SELATAN SEBAGAI ANTIBAKTERI

2010 ◽  
Vol 2 (2) ◽  
pp. 31
Author(s):  
Farida Crisnaningtyas
Keyword(s):  
Antibacterial Activity ◽  
Ethanol Extract ◽  
Proximate Analysis ◽  
Gram Negative Bacteria ◽  
Bacillus Sp ◽  
Clear Zone ◽  
Gram Negative ◽  
E Coli ◽  
Ant Nests ◽  
Ant Nest

The use of ant nests (Myrmecodia pendens) native of Borneo as an antibacterial. The aim of this research is to make the crude drug  from the ant nest, simply extracting, condensing and test the ability of anti-bacterial properties of ant nests. This study covers the development of these extracts, proximate analysis, and test the antibacterial activity of plant-ant nest. Parameters measured were the growth of antibacterial activity against Salmonella sp., E. coli and Bacillus sp. showed by inhibition (clear zone). The results showed that plant-ant nests have antibacterial power. Ethanol extract of the ant nests provide a better inhibition compared with water extraction ant nests. Antibacterial activity of the ant nest extracts can be applied both in gram- positive and gram-negative bacteria. Key wood : ant nest, antibacterial,  inhibition capability

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